"I am happy with my horse and he deserves his chance."
Carston is unsure what the future holds for Hasabro after the weekend, but said he has options on either side of the Cook Strait.
"We will be guided by how he runs on Saturday," he said.
"There are no plans with him as yet, but there are plenty of options for him in both islands."
Hasabro is out of broodmare gem Halloween, making him a full-brother to Group One winner Hasahalo, and half-brother to Group Three winners All Saints' Eve and All Hallows' Eve.
Hasabro was purchased out of Waikato Stud's 2017 New Zealand Bloodstock Premier Yearling Sale for $220,000 by Go Racing, who purchased Hasahalo a year earlier for $110,000.
Meanwhile, Carston is also looking forward to racing on his home track of Riccarton on Friday where he will have a strong contingent.
He believes Dubai Lady is a strong chance of breaking maiden ranks in the NZB Insurance Pearl Series Race (1200m).
"I have got a nice team in on Friday. Dubai Lady is close to winning a maiden race," Carston said.
"Both O'Jessica and O'Jude have both been going good races, and I think they are two of my better chances."
– NZ Racing Desk